Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 40 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s science idea. 3. For a fair test: one thing changed, the rest kept the same, one thing measured. 4. For safety: an adult helps, nothing goes in the mouth, no heat, sharp tools or plug points for children.

1. 1.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a balloon (c) turmeric powder (d) food colour
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🏗️ Which of these gets its strength from triangles? (a) an eggshell (b) a hollow bird bone (c) a temple dome (d) an electric tower
4. 4.🔍 Which is the odd one out? (a) aluminium foil (b) a shiny steel plate (c) still clear water (d) black cloth
5. 5.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
6. 6.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) turmeric powder (c) cold water to rinse (d) fresh cream
7. 7.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a grown-up (d) a pet
8. 8.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔦 Which of these is opaque? (a) a steel plate (b) oily paper (c) clear plastic film (d) frosted glass
10. 10.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) a balloon (c) a battery cell (d) a tall clear glass
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a balloon (b) a sunny window (c) a clear glass of water (d) a sheet of white paper
12. 12.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the stick kept upright is the one thing we change. (a) True (b) False
13. 13.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
14. 14.⚖️ A child tests plants with and without water, but puts one in the sun and one in a cupboard. Is it a fair test? (a) only on Sundays (b) no, two things changed (c) yes, if done fast (d) yes, it is fair
15. 15.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: how far we pull it back is kept the same. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) string (d) a magnet
17. 17.🔬 Which step of the scientific method is this: “I think seeds need water to sprout.” (a) hypothesis (b) observation (c) conclusion (d) experiment
18. 18.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
19. 19.🫧 Which of these is an acid? (a) orange juice (b) soap solution (c) detergent water (d) plain water
20. 20.True or false: a steel spoon does not move to a charged comb. (a) False (b) True
21. 21.🫧 Which of these is neutral? (a) baking soda water (b) curd (c) sugar water (d) detergent water
22. 22.🧺 Which of these is needed for the density tower? (a) water with food colour (b) a battery cell (c) a magnet (d) turmeric powder
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the same place (c) the number of seeds (d) how many seeds sprout
24. 24.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
25. 25.True or false: the rocket goes backward. (a) False (b) True
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a tub of water (c) a results table (d) turmeric powder
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the length of the blades (c) the person dropping
28. 28.🧺 Which of these is not needed for the pendulum? (a) a string (b) a ruler (c) turmeric powder (d) a stopwatch
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the light we look in
30. 30.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
31. 31.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) it grows bigger (d) there is no change
32. 32.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) safety scissors (c) a balloon (d) a mirror
33. 33.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a high window ledge (c) a roof edge (d) a wobbly chair
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
36. 36.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a balloon (c) safety scissors (d) a strip of paper
37. 37.🛟 Is this a safe or an unsafe habit in an experiment: wiping up spills at once? (a) safe (b) unsafe
38. 38.⚡ A rubbed comb is held near puffed rice. What happens? (a) does not move (b) jumps to the comb
39. 39.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a small bowl (c) water (d) yeast
40. 40.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight

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